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Finding the Fourth Proportional to 447.79, 668.45 and 356.35

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Solution

The fourth proportional to 447.79, 668.45 and 356.35 is: 531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.79 : 668.45 = 356.35 : x
  2. Step 2: Convert to fraction form
    447.79/668.45 = 356.35/x
  3. Step 3: Cross multiply
    447.79x = 668.45 × 356.35
  4. Step 4: Simplify right side
    447.79x = 238,202.16
  5. Step 5: Solve for x
    x = 238,202.16/447.79
  6. Step 6: Final answer
    x = 531.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.